I just take them apart and flip them together with a few dots of hot glue between fabrics. Then add a center and voila!
Hot glue goes on between flower and ribbon on the clip OR

sometimes I do sew the flower. There's a hole in there so I just do four holes around the center. Then I pick two places somewhere in there to put my needle thru to go thru the center of that hole in the top of the alligator clip.